Models for Estimating Foliar Fe and Mn Concentration of Armeniaca vulgaris cv. Luntaibaixing Using Spectral Reflectance
HU Zhen-zhu, PAN Cun-de*, WANG Shi-wei, GUO Zhi-chao, WANG Qing-tao, DING Fan, LI Yuan
College of Forestry and Horticulture，Xinjiang Agricultural University，Key Laboratory of Forestry Ecology and Industry Technology in Arid Region, Education Department of Xinjiang, Urumqi 830052, China
Abstract：Aimed at providing technology for a rapid nutrition diagnosis system of micronutrients in Armeniaca vulgaris cv. Luntaibaixing, we established an element concentration estimation model for its foliar ferrum (Fe) and manganese (Mn) concentration based on spectrum analysis. The foliar spectrum reflectance at various phenological periods of fruit development under different soil fertility conditions was measured by Unispec-SC spectrometer. By analyzing the correlation of foliar Fe, Mn concentration at various phenological periods of fruit development, the spectrum reflectance Rλ and its first-order differential ｆ′(Rλ), we filtered out its sensitive bands. And we established an element concentration estimation model for its foliar Fe and Mn at various phenological periods of fruit development with the linear regression model. The results showed that the spectral sensitive bands of foliar Fe in fruit setting period were 873 and 874 nm, 375 and 437 nm in fruit core-hardening period, 836 and 837 nm in maturity period and 325 and 1 054 nm in post-harvest period. However, the spectral sensitive bands of Mn were 913 and 1 129 nm, 425 and 970 nm, 390 and 466 nm, 423 and 424 nm, respectively. The Fe and Mn concentration of A. vulgaris cv. Luntaibaixing leaves were the most relevant to the first-order differential ｆ′(Rλ) of its spectrum reflectance, whose linear spectrum estimation model fitting degree was the highest and reached to a significant or highly significant level. It showed that the spectral sensitive bands of Fe and Mn element varied with different phenological periods of fruit development. The spectrum estimation models for its foliar Fe and Mn concentration could be established with linear model according to its first-order differential ｆ′(Rλ).
胡珍珠，潘存德*，王世伟，郭志超，王清涛，丁 凡，栗 媛. 轮台白杏叶片铁锰浓度光谱估算模型[J]. 光谱学与光谱分析, 2014, 34(09): 2485-2489.
HU Zhen-zhu, PAN Cun-de*, WANG Shi-wei, GUO Zhi-chao, WANG Qing-tao, DING Fan, LI Yuan. Models for Estimating Foliar Fe and Mn Concentration of Armeniaca vulgaris cv. Luntaibaixing Using Spectral Reflectance. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(09): 2485-2489.
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